HRV and Collapse

Heart Rate Viariability (HRV) is a relativley new concept with the first refernce in 1999. Collapse is responsible for 20,000 lives in the UK. Of 700 papers I researched on collapse not one noted HRV. Of the 9 papers I could find on HRV there was one line on epilispy. HRV records are selling wearable devices. I now have 4 years of health data on my I phone. 2 years of high heart rate (HR) and static HRV. No collapse. 3rd year and collapse which coincided with variable HRV. 4th year and ablation; no collapse and HRV back to normal. There has to be a connection.